In the past, I always had a problem breaking condoms. Always used water based lubes. That was before they started making the XLs. And yes, they do make a difference. My dick is 10x6.5 inches and uncircumcised. So, the XLs are necessary. You being from Venezuela, I will assume your boyfriend is not circumcised. The action of the foreskin will help break the condom and also makes longer condoms a necessity. A foreskin will roll the condom off if it is too short.
I once went through almost a whole pack of Trojan Magnum XLs breaking every one I used. I called Trojan about it and after giving required info, lot numbers etc., they sent me a whole new box. I haven't broken but one or two since.
Get him larger condoms, use proper lube and put them on correctly and you won't break near as many. Or try the "female" condoms made to go inside the receptive orifice and not on the penis. They are made of a stronger material.